Gear box controlling system for heavy truck, has speed selection and speed passage levers cooperating with each other in driver's cab operating position so displacement of levers of assembly leads to displacement of levers of other assembly

摘要

The system has assemblies (14, 31) mounted on a driver's cab (12) and a chassis (13) of a heavy truck, respectively. The assembly (14) displaces a speed selection lever and a speed passage lever between two positions during displacement of a speed lever (24) by a user. The assembly (31) causes changing of speed ratio during displacement of a speed selection lever and a speed passage lever. The levers cooperate with each other in driver's cab operating position so the displacement of the levers of the assembly (14) leads to the displacement of the levers of the assembly (31).